Method and apparatus for transmitting uplink control information (uci) in wireless communication system

ABSTRACT

A method for a wireless device to which a plurality of serving cells are assigned transmitting uplink control information (UCI) in a wireless communication system is provided. The wireless device transmits uplink data in a subframe to a physical uplink shared channel (PUSCH), and transmits UCI including a hybrid automatic repeat request (HARQ) ACK/NACK and periodic channel state information (CSI) in the subframe to a physical uplink shared channel (PUCCH). The PUCCH and the PUSCH have the same demodulation reference signal (DMRS) location within the subframe.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the National Stage filing under 35 U.S.C. 371 ofInternational Application No. PCT/KR2016/010626, filed on Sep. 23, 2016,which claims the benefit of U.S. Provisional Application No. 62/232,408filed on Sep. 24, 2015, the contents of which are all herebyincorporated by reference herein in their entirety.

BACKGROUND OF THE INVENTION Field of the invention

The present invention relates to wireless communication, and moreparticularly, to a method of transmitting uplink control information ina wireless communication system, and an apparatus using the method.

Related Art

3^(rd) generation partnership project (3GPP) long termevolution-advanced (LTE-A) is a technique satisfying a bandwidth of upto 100 MHz and a data rate of up to 1Gbps. Carrier aggregation (CA) isone of techniques for increasing a maximum bandwidth by using aplurality of component carriers. One component carrier operates for oneserving cell, and as a result, a terminal receives a service providedfrom a plurality of serving cells.

With the increase in the number of supported serving cells, an amount offeedback information reported by the terminal also increases. Thefeedback information includes channel state information (CSI), hybridautomatic repeat request (HARQ) ACK/NACK, or the like.

A physical uplink control channel (PUCCH) is defined for transmission ofthe feedback information. 3GPP LTE-A provides various PUCCH formats suchas a PUCCH format 1/1a/1b, a PUCCH format 2/2a/2b, a PUCCH format 3, aPUCCH format 4, a PUCCH format 5, or the like according to a payloadsize.

With the increase in the number of serving cells supported in a CAenvironment, a method of transmitting uplink control information isproposed.

SUMMARY OF THE INVENTION

The present invention provides a method for transmitting uplink controlinformation in a wireless communication system, and a device using themethod.

In an aspect, a method for transmitting uplink control information in awireless communication system is provided. The method is performed by awireless device to which a plurality of serving cells are configured.The method includes receiving, by the wireless device, a simultaneoustransmission indicator that enables a simultaneous transmission of aphysical uplink shared channel (PUSCH) and a physical uplink sharedchannel (PUCCH), transmitting, by the wireless device, uplink data onthe PUSCH in a subframe, and transmitting, by the wireless device,uplink control information (UCI) on the PUSCH in the subframe, the UCIincluding a hybrid automatic repeat request (HARQ) acknowledgement(ACK)/not-acknowledgement (NACK) and periodic channel state information(CSI). The PUCCH and the PUSCH have the same demodulation referencesignal (DMRS) position in the subframe.

In another aspect, a device for which a plurality of serving cells areconfigured in a wireless communication system includes a transceiverconfigured to transmit and receive a radio signal, and a processorcoupled to the transceiver. The processor is configured to receive asimultaneous transmission indicator that enables a simultaneoustransmission of a physical uplink shared channel (PUSCH) and a physicaluplink shared channel (PUCCH), transmit uplink data on the PUSCH in asubframe, and transmit uplink control information (UCI) on the PUSCH inthe subframe, the UCI including a hybrid automatic repeat request (HARQ)acknowledgement (ACK)/not-acknowledgement (NACK) and periodic channelstate information (CSI). The PUCCH and the PUSCH have the samedemodulation reference signal (DMRS) position in the subframe.

A wireless device for which a plurality of serving cells are configuredcan transmit uplink control information on various types of uplinkcontrol channels.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a subframe structure in 3rd generation partnership project(3GPP) long term evolution-advanced (LTE-A).

FIG. 2 shows an example of performing hybrid automatic repeat request(HARQ).

FIG. 3 shows an example of a channel structure for a physical uplinkcontrol channel (PUCCH) format 3.

FIG. 4 shows an example of a channel structure for a PUCCH format 4.

FIG. 5 shows an example of a channel structure for a PUCCH format 5.

FIG. 6 shows uplink transmission according to an embodiment of thepresent invention.

FIG. 7 shows an example of transmitting uplink control information (UCI)on a physical uplink shared control channel (PUSCCH).

FIG. 8 is a block diagram showing a wireless communication systemaccording to an embodiment of the present invention.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

A wireless device may be fixed or mobile, and may be referred to asanother terminology, such as a user equipment (UE), a mobile station(MS), a mobile terminal (MT), a user terminal (UT), a subscriber station(SS), a wireless device, a personal digital assistant (PDA), a wirelessmodem, a handheld device, etc. The wireless device may also be a devicesupporting only data communication such as a machine-type communication(MTC) device.

A base station (BS) is generally a fixed station that communicates withthe wireless device, and may be referred to as another terminology, suchas an evolved-NodeB (eNB), a base transceiver system (BTS), an accesspoint, etc.

Hereinafter, it is described that the present invention is appliedaccording to a 3^(rd) generation partnership project (3GPP) long termevolution (LTE)/LTE-advanced (LTE-A). However, this is for exemplarypurposes only, and thus the present invention is also applicable tovarious wireless communication networks.

The wireless device may be served by a plurality of serving cells. Eachserving cell may be defined with a downlink (DL) component carrier (CC)or a pair of a DL CC and an uplink (UL) CC. The plurality of servingcells may be managed by one BS, or may be managed by a plurality of BSs.The plurality of serving cells may be divided into a plurality of cellgroups.

The serving cell may be classified into a primary cell (PCell) and asecondary cell (SCell). The PCell operates at a primary frequency, andis a cell designated as the PCell when an initial network entry processis performed or when a network re-entry process starts or in a handoverprocess. The PCell is also called a reference cell. The SCell operatesat a secondary frequency. The SCell may be configured after a radioresource control (RRC) connection is established, and may be used toprovide an additional radio resource. At least one PCell is configuredalways. The SCell may be added, modified, or released by usinghigher-layer signaling (e.g., an RRC message).

A cell index (CI) of the primary cell may be fixed. For example, alowest CI may be designated as a CI of the primary cell. It is assumedhereinafter that the CI of the primary cell is 0 and a CI of thesecondary cell is allocated sequentially starting from 1.

FIG. 1 shows a subframe structure in 3GPP LTE-A.

A radio frame includes 10 subframes indexed with 0 to 9. One subframeincludes 2 consecutive slots. A time required for transmitting onesubframe is defined as a transmission time interval (TTI). For example,one subframe may have a length of 1 millisecond (ms), and one slot mayhave a length of 0.5 ms.

A subframe may include a plurality of orthogonal frequency divisionmultiplexing (OFDM) symbols. Since the 3GPP LTE uses orthogonalfrequency division multiple access (OFDMA) in a downlink (DL), the OFDMsymbol is only for expressing one symbol period in the time domain, andthere is no limitation in a multiple access scheme or terminologies. Forexample, the OFDM symbol may also be referred to as another terminologysuch as a single carrier frequency division multiple access (SC-FDMA)symbol, a symbol period, etc.

Although it is described that one slot includes 14 OFDM symbols forexample, the number of OFDM symbols included in one slot may varydepending on a length of a cyclic prefix (CP). According to 3GPP LTE-A,in case of a normal CP, one slot includes 14 OFDM symbols, and in caseof an extended CP, one slot includes 12 OFDM symbols.

A resource block (RB) is a resource allocation unit, and includes aplurality of subcarriers in one slot. For example, if one slot includes7 OFDM symbols in a time domain and the RB includes 12 subcarriers in afrequency domain, one RB may include 7×12 resource elements (REs).

A physical channel of 3GPP LTE-A may be classified into a downlink (DL)physical channel and an uplink (UL) physical channel The DL physicalchannel includes a physical downlink control channel (PDCCH), a physicalcontrol format indicator channel (PCFICH), a physical hybrid-ARQindicator channel (PHICH), and a physical downlink shared channel(PDSCH).

The PCFICH transmitted in a first OFDM symbol of the subframe carries acontrol format indicator (CFI) regarding the number of OFDM symbols(i.e., a size of the control region) used for transmission of controlchannels in the subframe. A wireless device first receives the CFI onthe PCFICH, and thereafter monitors the PDCCH.

The PHICH carries a positive-acknowledgement(ACK)/negative-acknowledgement (NACK) signal for an uplink hybridautomatic repeat request (HARQ). The ACK/NACK signal for uplink (UL)data on a PUSCH transmitted by the wireless device is transmitted on thePHICH.

Control information transmitted through the PDCCH is referred to asdownlink control information (DCI). The DCI may include resourceallocation of the PDSCH (this is referred to as a downlink (DL) grant),resource allocation of a PUSCH (this is referred to as an uplink (UL)grant), a set of transmit power control commands for individual UEs inany UE group, and/or activation of a voice over Internet protocol(VoIP).

The UL physical channel includes a physical uplink control channel(PUCCH) and a physical uplink shared channel (PUSCH). The PUCCH isallocated in an RB pair in a subframe. RBs belonging to the RB pairoccupy different subcarriers in each of a 1^(st) slot and a 2^(nd) slot.The PUSCH is allocated by a UL grant on the PDCCH. In a normal CP, a4^(th) OFDM symbol of each slot is used in transmission of ademodulation reference signal (DMRS) for the PUSCH.

Uplink control information (UCI) includes at least any one of HARQACK/NACK, channel state information (CSI), and a scheduling request(SR). Hereinafter, as an indicator for indicating a state of a downlink(DL) channel, the CSI may include at least any one of a channel qualityindicator (CQI) and a precoding matrix indicator (PMI).

In order to transmit a variety of UCI on a PUCCH, a combination betweenthe UCI and the PUCCH is defined as a PUCCH format as shown in thefollowing table.

TABLE 1 PUCCH format UCI to be transmitted PUCCH format 1 Positive SRPUCCH format 1a/1b 1-bit or 2-bit HARQ ACK/NACK PUCCH format 2 CSIreport PUCCH format 2a/2b CSI report and 1-bit or 2-bit HARQ ACK/NACKPUCCH format 3 HARQ ACK/NACK, SR, CSI

The PUCCH format 1a/1b is used to carry the 1-bit or 2-bit HARQ ACK/NACKby using binary phase shift keying (BPSK) modulation or quadrature phaseshift keying (QPSK) modulation.

The PUCCH format 3 is used to carry encoded UCI of 48 bits. The PUCCHformat 3 may carry HARQ ACK/NACK for a plurality of serving cells and aCSI report for one serving cell.

FIG. 2 shows an example of performing HARQ.

A wireless device monitors a PDCCH, and receives a DL grant including aDL resource allocation on a PDCCH 201 (or EPDDCH) in a DL subframe n.The wireless device receives a DL transport block through a PDSCH 202indicated by the DL resource allocation.

The wireless device transmits an ACK/NACK signal for the DL transportblock on a PUCCH 210 in a UL subframe n+4. The ACK/NACK signalcorresponds to an ACK signal when the DL transport block is successfullydecoded, and corresponds to a NACK signal when the DL transport blockfails in decoding. Upon receiving the NACK signal, a BS may retransmitthe DL transport block until the ACK signal is received or until thenumber of retransmission attempts reaches its maximum number.

In 3GPP LTE-A, a PUCCH format 1/1a/1b, a PUCCH format 2/2a/2b, a PUCCHformat 3, a PUCCH format 4 and a PUCCH format 5 are used to carry anACK/NACK signal which is a reception acknowledgement for HARQ. All PUCCHformats use different resource blocks in two slots.

FIG. 3 shows an example of a channel structure for a PUCCH format 3.

One slot includes 7 OFDM symbols. 2^(nd) and 6^(th) OFDM symbols are RSOFDM symbols for DMRS. The remaining 5 OFDM symbols are data OFDMsymbols for UCI.

The PUCCH format 3 may carry 24 data symbols d(0) to d(23). When usingQPSK, the PUCCH format 3 may carry 48 encoded bits.

In a first slot, first 12 data symbols d(0) to d(11) are spread in atime domain by using an orthogonal code W(j)={w(0), w(1), w(2), w(3),w(4)}. The time-domain spreading includes that w(i) corresponds to eachOFDM symbol in a slot. In a second slot, second 12 data symbols d(12) tod(23) are spread in the time domain by using the orthogonal code W(j).

A time/frequency/code resource used in PUCCH transmission is called aPUCCH resource. For example, an orthogonal code index, a cyclic shiftindex, and a resource block index are required for the PUCCH format1/1a/1b. A cyclic shift index and a resource block index are requiredfor the PUCCH format 2/2a/2b. An orthogonal code index and a resourceblock index are required for the PUCCH format 2/2a/2b. A resource indexis a parameter used to determine a corresponding PUCCH resource.

A resource index for the PUCCH format 1a/1b for ACK/NACK is given by acorresponding DL grant. Although a resource index for the PUCCH format 3for ACK/NACK is given by a corresponding DL grant, this is designated ina pre-designated resource index set. For example, a BS pre-designates 4resource indices for the PUCCH format 3 through an RRC message. Inaddition, one of the 4 resource indices may be designated through aresource indicator in a DL grant (this is called an ‘ACK/NACK resourceindicator (ARI)’).

FIG. 4 shows an example of a channel structure for a PUCCH format 4.

One slot includes 7 OFDM symbols. An OFDM symbol in the middle (i.e., a4^(th) OFDM symbol) is an RS OFDM symbol for DMRS. The remaining 6 OFDMsymbols are data OFDM symbols for UCI. If one slot includes 6 OFDMsymbols, a 3^(rd) OFDM symbol is an RS OFDM symbol, and the remaining 5OFDM symbols are data OFDM symbols.

The extended PUCCH format does not use frequency-domain spreading andtime-domain spreading. When one resource is allocated to the extendedPUCCH format, 12 data symbols may be transmitted for each OFDM symbol.Therefore, 144 data symbols d(0) to d(143) may be transmitted in onesubframe. When using QPSK, the extended PUCCH format may carry 288encoded bits.

FIG. 5 shows an example of a channel structure for a PUCCH format 5.

In comparison with the channel structure of FIG. 3, 6 data symbols arerepeated in one resource block for each OFDM symbol. For example, {d(0),d(1), d(2), d(3), d(4), d(5), d(0), d(1), d(2), d(3), d(4), d(5)} istransmitted in a first OFDM symbol. Accordingly, although 144 datasymbols can be transmitted in the channel structure of FIG. 3, 72 datasymbols d(0) to d(71) may be transmitted in this channel structure. Whenusing QPSK, the extended PUCCH format may carry 144 encoded bits.

In order to support multi-user multiplexing, code division multiplexing(CDM) may be supported in a data symbol repeated in each OFDM symbol.For example, {+d(0), +d(1), +d(2), +d(3), +d(4), +d(5), +d(0), +d(1),+d(2), +d(3), +d(4), d(5)} may be transmitted through CDM 0, and {+d(0),+d(1), +d(2), +d(3), +d(4), +d(5), −d(0), −d(1), −d(2), −d(3), −d(4),−d(5)} may be transmitted through CDM 1. A cyclic shift value used inDMRS may vary depending on the CDM.

A plurality of resource blocks may be allocated to the PUCCH format 4.That is, only one resource block may be allocated to the conventionalPUCCH format 1/2/3, whereas one or more resource blocks may be allocatedto the PUCCH format 4.

Similarly to the configuration of the PUCCH format 3, in the resourceconfiguration for the PUCCH format 4/5, a plurality of candidateresources may be configured in advance through an RRC message, and oneof the plurality of candidate resources may be designated through a DLgrant.

The PUCCH formats 4 and 5 provide a great payload and have the same DMRSstructure as the PUSCH, and thus have a characteristic similar to PUSCHtransmission.

A plurality of cells are configured for a wireless device in a CAenvironment. UCI for a plurality of cells is transmitted on a PUCCH.HARQ ACK/NACK includes ACK/NACK across all of the configured pluralityof cells. The UCI may include the HARQ ACK/NACK for the plurality ofcells, an SR for a scheduling request, and/or a CSI report for theplurality of cells.

Simultaneous transmission of a PUSCH and a PUCCH is prohibited in theexisting 3GPP LTE since transmit power of the wireless device islimited. Herein, the simultaneous transmission implies that the PUSCHand the PUCCH are transmitted in one subframe. However, the simultaneoustransmission of the PUSCH and the PUCCH is possible in 3GPP LTE-A. ABSmay transmit a simultaneous transmission indicator to the wirelessdevice to inform the wireless device of whether the simultaneoustransmission of the PUSCH and the PUSCCH is possible. If thesimultaneous transmission is possible, the wireless device may transmitthe PUSCH and the PUCCH in one subframe.

It becomes possible that a plurality of cells are configured, an amountof UCI increases, various PUCCH formats are configured, and PUCCH-PUSCHsimultaneous transmission is achieved. Therefore, it is required toclarify which PUCCH format will be used by the wireless device in aspecific situation. This is because, when there is a discrepancy in aPUCCH format used between the BS and the wireless device, UCI forcarrying the PUCCH format is lost.

Hereinafter, a PUCCH format 4/5 in which a DMRS is transmitted at thesame position as a DMRS of the PUSCH is collectively referred to as aphysical uplink shared control channel (PUSCCH). When it is said thatthe PUSCCH is configured, it means that at least any one of the PUCCHformat 4 and the PUCCH format 5 is configured.

A UE may support the following capabilities and may inform the BS ofwhether the capability is supported.

multiClusterPUSCH-WithinCC: The UE may transmit the PUSCH by using an RBcluster separated in a frequency domain in one subframe for one cell.

Simultaneous PUCCH-PUSCH: The UE may simultaneously transmit the PUCCHand the PUSCH in one subframe.

The BS which has identified that the capability is supported mayinstruct the UE to activate the capability. A UE which supports both ofthe above two capabilities may simultaneously transmit the PUSCH and thePUSCCH in one subframe.

The simultaneous transmission indicator transmitted by the BS to the UEenables the UE to simultaneously transmit the PUCCH and the PUSCH. Ifthe simultaneous transmission indicator indicates that simultaneoustransmission is not allowed, the UE piggybacks UCI on the PUSCH insteadof transmitting the PUCCH in a subframe in which the PUSCH is scheduled.

The PUCCH and/or the PUSCCH may always be transmitted only in a primarycell.

The following operation is proposed with regards to PUSCH-PUCCH/PUSCCHsimultaneous transmission.

In a first embodiment, a UE which has informed that both MultiClusterPUSCH-WithinCC and Simultaneous PUCCH-PUSCH are not supported may alsosupport simultaneous transmission of a PUSCCH and a PUSCH in onesubframe between different subframes. A UE which supports the PUSCCH maysupport simultaneous transmission of the PUSCCH and the PUSCH in thesame subframe between different cells. For example, the UE may transmitthe PUSCCH in a subframe 4 of a first cell, and may transmit the PUSCHin the subframe 4 of the first cell.

In a second embodiment, a UE which supports only MultiCluster PUSCH maytransmit the PUSCCH and the PUSCH in one subframe for one cell.

In a third embodiment, a UE for which a plurality of cells areconfigured and for which PUSCH-PUCCH simultaneous transmission isconfigured transmits UCI on the PUSCCH when the PUSCCH is configured.Although the UCI is piggybacked on the PUSCH in the conventional 3GPPLTE, the UCI may be transmitted on the PUSCCH instead of on the PUSCH.

FIG. 6 shows uplink transmission according to an embodiment of thepresent invention. This is an example of frequency division duplex (FDD)transmission, but the present embodiment may also be applied to timedivision duplex (TDD) transmission.

It is assumed that a plurality of serving cells are configured for awireless device, and whether PUSCH-PUCCH simultaneous transmission ispossible is given. A PUSCCH is configured for the wireless device. If atleast one PUCCH format-4 resource and/or at least one PUCCH format-5resource are given, the PUSCCH may be configured. The BS may transmitinformation regarding the configuration to the wireless device throughan RRC message.

A multiplexing indicator regarding whether ACK/NACK and CSI can bemultiplexed to one PUSCCH as UCI may be given to the wireless device.For example, if the multiplexing indicator is FALSE, the ACK/NACK andthe CSI cannot be multiplexed to one PUSCCH as the UCI, and if themultiplexing indicator is TRUE, the ACK/NACK and the CSI can bemultiplexed to one PUSCCH as the UCI.

First, in a subframe n, the wireless device receives a UL grant forPUSCH scheduling. In a subframe n+4, the wireless device transmits ascheduled PUSCH. In this case, in the subframe n+4, when HARQ ACK/NACKand a periodic CSI report are triggered, the following operation may beperformed.

(1) If PUSCH-PUCCH simultaneous transmission is not configured, the HARQACK/NACK and the periodic CSI report are piggybacked on the PUSCH.

(2) If PUSCH-PUCCH simultaneous transmission is configured and thePUSCCH is not configured, the HARQ ACK/NACK is transmitted on the PUCCHand the periodic CSI report is piggybacked on the PUSCH.

(3) If PUSCH-PUCCH simultaneous transmission is configured and thePUSCCH is configured, the HARQ ACK/NACK and the periodic CSI report aretransmitted on the PUSCCH.

When simultaneous transmission of the PUSCH and the PUCCH is triggeredin a situation where a plurality of cells are configured, it may beallowed to transmit UCI always on the PUSCCH, so that a discrepancy of achannel format can be prevented between the BS and the wireless device.

In addition, if a multiplexing indicator is given, an operation (3) maybe as follows.

(3-1) If PUSCH-PUCCH simultaneous transmission is configured, the PUSCCHis configured, and the multiplexing indicator is FASLE, then the HARQACK/NACK is transmitted on the PUCCH or the PUSCCH and the periodic CSIreport is piggybacked on the PUSCH.

(3-1) If PUSCH-PUCCH simultaneous transmission is configured, the PUSCCHis configured, and the multiplexing indicator is TRUE, then the HARQACK/NACK and the periodic CSI report are transmitted on the PUSCCH.

FIG. 7 shows an example of transmitting UCI on a PUSCCH.

In the above operation (3-1), if PUSCH-PUCCH simultaneous transmissionis configured, the PUSCCH is configured, and the multiplexing indicatoris TRUE, then the HARQ ACK/NACK and the periodic CSI report aretransmitted on the PUSCCH.

The total number of bits of the HARQ ACK/NACK and the periodic CSIreport is a UCI payload for the PUSCCH. The UCI payload may have a sizegreater than or equal to 22 bits.

Four resources for a PUCCH format 4 or four resources for a PUCCH format5 may be configured. The number of resources is for exemplary purposesonly. If the PUCCH format 4 is configured, a wireless device selects atleast any one of the configured four PUCCH format-4 resources. If thePUCCH format 4 is not configured, the wireless device selects at leastany one of the configured four PUCCH format-5 resources. A DL grantcorresponding to the HARQ ACK/NACK may include a resource indicatorindicating which resource is selected among a plurality of PUCCHresources.

Meanwhile, the wireless device may determine whether a part of UCI willbe piggybacked on the PUSCH by considering a UCI payload and the numberof RBs allocated to the PUSCH/PUSCCH.

By considering the number of PUSCH RBs used in UCI transmission and apayload size of UCI to be transmitted, a part of UCI may be piggybackedon the PUSCH and the remaining parts may be transmitted on the PUSCCH.Alternatively, by considering the number of PUSCCH RBs used in UCItransmission and the payload size of UCI to be transmitted, a part ofUCI may be piggybacked on the PUSCH and the remaining parts may betransmitted on the PUSCCH. For example, if a size of the UCI payloadexceeds the payload size of the PUSCCH, the part of UCI may bepiggybacked on the PUSCH. The part of UCI to be piggybacked on the PUSCHmay include CSI.

A UCI code rate may be calculated based on the number of RBs and the UCIpayload size. If a code rate of UCI to be transmitted on the PUSCH isgreater than or equal to a specific value, all pieces of UCI may betransmitted on the PUSCCH. Alternatively, if the code rate of the UCI tobe transmitted on the PUSCCH is greater than or equal to the specificvalue, a part of UCI may be piggybacked on the PUSCH. The UCI payload tobe transmitted on the PUSCH may be determined by considering the coderate of the UCI to be transmitted on the PUSCCH.

If both of the code rate of the UCI to be transmitted on the PUSCCH andthe code rate of the UCI to be transmitted on the PUSCH are greater thanor equal to a specific value, the UCI may be preferentially transmittedon the PUSCCH.

FIG. 8 is a block diagram showing a wireless communication systemaccording to an embodiment of the present invention.

A wireless device 50 includes a processor 51, a memory 52, and atransceiver 53. The memory 52 is coupled to the processor 51, and storesvarious instructions executed by the processor 51. The transceiver 53 iscoupled to the processor 51, and transmits and/or receives a radiosignal. The processor 51 implements the proposed functions, procedures,and/or methods. In the aforementioned embodiment, an operation of thewireless device may be implemented by the processor 51. When theaforementioned embodiment is implemented with a software instruction,the instruction may be stored in the memory 52, and may be executed bythe processor 51 to perform the aforementioned operation.

ABS 60 includes a processor 61, a memory 62, and a transceiver 63. TheBS 60 may operate in a licensed band and/or an unlicensed band. Thememory 62 is coupled to the processor 61, and stores variousinstructions executed by the processor 61. The transceiver 63 is coupledto the processor 61, and transmits and/or receives a radio signal. Theprocessor 61 implements the proposed functions, procedures, and/ormethods. In the aforementioned embodiment, an operation of the BS may beimplemented by the processor 61.

The processor may include Application-Specific Integrated Circuits(ASICs), other chipsets, logic circuits, and/or data processors. Thememory may include Read-Only Memory (ROM), Random Access Memory (RAM),flash memory, memory cards, storage media and/or other storage devices.The RF unit may include a baseband circuit for processing a radiosignal. When the above-described embodiment is implemented in software,the above-described scheme may be implemented using a module (process orfunction) which performs the above function. The module may be stored inthe memory and executed by the processor. The memory may be disposed tothe processor internally or externally and connected to the processorusing a variety of well-known means.

In the above exemplary systems, although the methods have been describedon the basis of the flowcharts using a series of the steps or blocks,the present invention is not limited to the sequence of the steps, andsome of the steps may be performed at different sequences from theremaining steps or may be performed simultaneously with the remainingsteps. Furthermore, those skilled in the art will understand that thesteps shown in the flowcharts are not exclusive and may include othersteps or one or more steps of the flowcharts may be deleted withoutaffecting the scope of the present invention.

1-10. (canceled)
 11. A method for transmitting uplink controlinformation (UCI) in a wireless communication system, the methodperformed by a wireless device comprising: receiving a simultaneoustransmission indicator that enables a simultaneous transmission of aphysical uplink shared channel (PUSCH) and a physical uplink sharedchannel (PUCCH) in one subframe; receiving a multiplexing indicatorindicating whether a hybrid automatic repeat request (HARQ) ACK/NACK andperiodic channel state information (CSI) are multiplexed in the UCI whenthe HARQ ACK/NACK and the periodic CSI are triggered in one subframe;transmitting uplink data on the PUSCH in a subframe; and transmittingthe UCI on the PUCCH in the subframe, the UCI including the HARQACK/NACK, wherein the periodic CSI is further included in the UCI whenthe multiplexing indicator indicates that the HARQ ACK/NACK and the CSIare multiplexed in the UCI, and the periodic CSI is included in theuplink data when the multiplexing indicator indicates that the HARQACK/NACK and the CSI are not multiplexed in the UCI.
 12. The method ofclaim 11, wherein a payload size of the UCI is greater than 22 bits. 13.The method of claim 11, wherein the subframe in which the PUSCH and thePUCCH are transmitted includes a plurality of orthogonal frequencydivision multiplexing (OFDM) symbols.
 14. The method of claim 13,wherein the subframe includes 14 OFDM symbols.
 15. The method of claim13, wherein two demodulation reference signals (DM RSs) for the PUCCHare mapped to same OFDM symbols in the subframe with two DM RSs for thePUSCH.
 16. The method of claim 15, wherein the two DM RSs for the PUCCHare mapped to fourth and eleventh OFDM symbols of the subframe.
 17. Themethod of claim 11, further comprising: receiving a resourceconfiguration for the PUCCH, the resource configuration includinginformation on at least one resource block allocated to the PUCCH.
 18. Adevice comprising: a transceiver configured to transmit and receive aradio signal; and a processor coupled to the transceiver and configuredto: control the transceiver to receive a simultaneous transmissionindicator that enables a simultaneous transmission of a physical uplinkshared channel (PUSCH) and a physical uplink shared channel (PUCCH) inone subframe; control the transceiver to receive a multiplexingindicator indicating whether a hybrid automatic repeat request (HARQ)ACK/NACK and periodic channel state information (CSI) are multiplexed inthe UCI when the HARQ ACK/NACK and the periodic CSI are triggered in onesubframe; control the transceiver to transmit uplink data on the PUSCHin a subframe; and control the transceiver to transmit uplink controlinformation (UCI) on the PUCCH in the subframe, the UCI including theHARQ ACK/NACK, wherein the periodic CSI is further included in the UCIwhen the multiplexing indicator indicates that the HARQ ACK/NACK and theCSI are multiplexed in the UCI, and the periodic CSI is included in theuplink data when the multiplexing indicator indicates that the HARQACK/NACK and the CSI are not multiplexed in the UCI.
 19. The device ofclaim 18, wherein a payload size of the UCI is greater than 22 bits. 20.The device of claim 18, wherein the subframe in which the PUSCH and thePUCCH are transmitted includes a plurality of orthogonal frequencydivision multiplexing (OFDM) symbols.
 21. The device of claim 20,wherein the subframe includes 14 OFDM symbols.
 22. The device of claim20, wherein two demodulation reference signals (DM RSs) for the PUCCHare mapped to same OFDM symbols in the subframe with two DM RSs for thePUSCH.
 23. The device of claim 22, wherein the two DM RSs for the PUCCHare mapped to fourth and eleventh OFDM symbols of the subframe.
 24. Amethod performed by a base station comprising: transmitting asimultaneous transmission indicator that enables a simultaneoustransmission of a physical uplink shared channel (PUSCH) and a physicaluplink shared channel (PUCCH) in one subframe; transmitting amultiplexing indicator indicating whether a hybrid automatic repeatrequest (HARQ) ACK/NACK and periodic channel state information (CSI) aremultiplexed in the UCI when the HARQ ACK/NACK and the periodic CSI aretriggered in one subframe; receiving uplink data on the PUSCH in asubframe; and receiving uplink control information (UCI) on the PUCCH inthe subframe, the UCI including the HARQ ACK/NACK, wherein the periodicCSI is further included in the UCI when the multiplexing indicatorindicates that the HARQ ACK/NACK and the CSI are multiplexed in the UCI,and the periodic CSI is included in the uplink data when themultiplexing indicator indicates that the HARQ ACK/NACK and the CSI arenot multiplexed in the UCI.
 25. The method of claim 24, wherein apayload size of the UCI is greater than 22 bits.
 26. The method of claim24, wherein the subframe in which the PUSCH and the PUCCH aretransmitted includes a plurality of orthogonal frequency divisionmultiplexing (OFDM) symbols.
 27. The method of claim 26, wherein twodemodulation reference signals (DM RSs) for the PUCCH are mapped to sameOFDM symbols in the subframe with two DM RSs for the PUSCH.
 28. A devicecomprising: a transceiver configured to transmit and receive a radiosignal; and a processor coupled to the transceiver and configured to:control the transceiver to transmit a simultaneous transmissionindicator that enables a simultaneous transmission of a physical uplinkshared channel (PUSCH) and a physical uplink shared channel (PUCCH) inone subframe; control the transceiver to transmit a multiplexingindicator indicating whether a hybrid automatic repeat request (HARQ)ACK/NACK and periodic channel state information (CSI) are multiplexed inthe UCI when the HARQ ACK/NACK and the periodic CSI are triggered in onesubframe; control the transceiver to receive uplink data on the PUSCH ina subframe; and control the transceiver to receive uplink controlinformation (UCI) on the PUCCH in the subframe, the UCI including theHARQ ACK/NACK, wherein the periodic CSI is further included in the UCIwhen the multiplexing indicator indicates that the HARQ ACK/NACK and theCSI are multiplexed in the UCI, and the periodic CSI is included in theuplink data when the multiplexing indicator indicates that the HARQACK/NACK and the CSI are not multiplexed in the UCI.
 29. The device ofclaim 28, wherein a payload size of the UCI is greater than 22 bits. 30.The device of claim 28, wherein the subframe in which the PUSCH and thePUCCH are transmitted includes a plurality of orthogonal frequencydivision multiplexing (OFDM) symbols, and wherein two demodulationreference signals (DM RSs) for the PUCCH are mapped to same OFDM symbolsin the subframe with two DM RSs for the PUSCH.